Improvement in bushing for tool-handles



y @dated (gister i if @met l @Mirta www@ AMASA KASSON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO' HIMSELF'AND NELSON C. GRIDLEY, OF SAME PLACE.

Letters Patent, No. 85,230, dated December 22, '1868.

IMPROVEMENTIN BUSHING- FOR TOOL-HANDLES.

The Schedule referred to in these Letters Patent making part of the same.

. accompanying drawings, making part of this specification., and to the letters of reference ,marked thereon,

like letters indicating like parts wherever they occur.

To enable others skilled in the art to construct and use my invention, I will proceed to describe it. v

My invention relates to improvements in tool-handles, and consists in bushing or packing their chambers with rubber or gutta-percha, for the purpose of holding the' tool firmly and securely in its seat, and at the same time admit of its being conveniently and easily inserted or removed.

In the drawings-.- I Figures 1l and 2 arev longitudinal sections of 1n handle, with the bushing inserted, and with cap-'ferrules of different lengths.

Figure 3 is a cross-section in the line x-x of fig. 2.

Figure 4 is a longitudinal sectional view of the rectangular, and

Figure 5, a side view of the circular bushing.

It is well known to all who have occasion to use the same handle for diiereut tools, or the saine handle for the same tool, that the chamber often becomes smooth or enlarged, so that the tool is constantly working loose, and has to be frequently driven back to its seat, and sometimes wedged there, in order to keep it in its place. y

To obviate this difficulty, tool-handles are often provided with set-screws, spring-clamps, or other devices forl conveniently holding the tool inplace, and permitting its removal, and the insertion oi' another, when desired.

My invention, which consists in the insertion of vul? canized rubber in the chamber of the tool-handle, is.

for the purpose of securing the same results at far less vtrouble and cost, and this is done by the' friction and der,'a at the inner end of the enlargement, as shown in the same figures.4

Within this enlargement, I insert rubber or guttapercha bushing, I), long enough to extend through its entire length, and thick enough -to not onlyl llllthe enlargement, but to extend a short distance into the original chamber.v When the enlarged chamber is cil'- cular, or its sides of the same width, the bushing may be of the same thickness, but when these sides (lider in width,the-bushing opposite the wider sides maybe correspondingly thicker than it is opposite the narrower ones. When the enlarged chamber is circular, with circular bushing, as shown in iig. 5, inserted,l and having a rectangular opening, as shown in iig. 3, it is obvious that the bushing will be thickest opposite the longest sidesof the' opening.

The bushing, when inserted, will rest against the shoulder ai, and be prevented by it from being shoved further into-the chamber.

After it is inserted, I fit on the end of the handle, and over the bushing, for the double purpose of strengthening the handle and securingthe bushing, a cap-ferrule, C, with an opening, b, in its top, corresponding in shape with the opening'thrdugh the bushing, as shown in figs. l, 2, and 3, and, if desired, make it long enough to receive a screw, c, as shown in iig. 2.

In using my handle, I insert the shank of the tool in the opening, b, and drive it to its seat. As it passes in, and while being forced home, the bushing will be crowded back, but, when fairly in its place, the bush- Y ing, by its elasticity, las well as by the friction nature of itssurfacc, will clasp it tightly, and prevent its slip-v ping or working loose. The tapering chamber, in con'- nection with the bushing, will also serve to centre the tool in the handle.

Then desired, the tool may be readily removed, and another inserted.

In this way I am able to produce a cheap and convenient handle for tools, which can be readily attached or removed, and at the same time will not slip or Work loose.

Having thusdescribed my invention,

The packing or bushing D, composed lof rubber o1' gutta-percha, either 'raw' `or vulcanized, when applied to a tool-handle, substantially as and for the purpose described.

Witnesses: f

N. (l. GRIDLEY, FRED. T. DAY.

v A. O.' KASSON. 

